Overview
Nodularin is a cyanobacterial toxin produced primarily by Nodularia spumigena, a species found in brackish waters. It belongs to the cyclic pentapeptide class and shares structural similarities with microcystins. First identified in the 1980s, nodularin has since been recognized for its hepatotoxicity and environmental impact. Its production is linked to algal blooms, which can contaminate water supplies and aquatic ecosystems. Due to its stability and toxicity, nodularin is a focus of environmental and public health research, particularly in regions prone to cyanobacterial blooms.
Physical and Chemical Properties
Nodularin is a cyclic peptide with a molecular weight of 824.97 g/mol. It is soluble in polar solvents like water and methanol but exhibits limited solubility in non-polar solvents. The toxin is stable under moderate temperatures but degrades under intense UV light or extreme pH conditions. Its mechanism of toxicity involves the inhibition of protein phosphatases 1 and 2A, leading to cellular damage in the liver. Analytical methods such as HPLC and mass spectrometry are commonly used to detect and quantify nodularin in environmental and biological samples.
Main Applications
Nodularin is primarily used in scientific research to study cyanobacterial toxins and their effects on ecosystems and human health. It serves as a reference standard in environmental monitoring programs to assess water quality and detect harmful algal blooms. In toxicology, nodularin is employed to investigate liver damage and the mechanisms of protein phosphatase inhibition. Its role in ecotoxicology studies helps evaluate risks to aquatic organisms and develop mitigation strategies for contaminated water bodies.
Safety and Storage
Due to its high toxicity, nodularin must be handled with extreme caution. Researchers should use personal protective equipment (PPE), including gloves, lab coats, and eye protection, to prevent exposure. Work should be conducted in a fume hood to avoid inhalation. Storage conditions are critical to maintaining nodularin's stability. It should be kept at -20°C in a dark, dry environment, preferably in airtight containers. Prolonged exposure to light, heat, or moisture can degrade the compound, reducing its efficacy for research purposes.
B2B Procurement Guide
When procuring nodularin for research or industrial applications, prioritize suppliers with a proven track record in cyanobacterial toxins. Request certificates of analysis (CoA) to verify purity, typically ≥95% for most studies. Analytical techniques like HPLC or LC-MS should confirm the absence of contaminants. Pricing varies based on purity and quantity, with research-grade nodularin costing approximately $200-$500 per milligram. Bulk purchases may qualify for discounts, but ensure proper storage and handling protocols are in place to maintain compound integrity during transport and use.
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